We have burned wood for years and never had the chimney cleaned, what now?
Stop burning until the flue has been swept and inspected with a camera. Years of wood smoke leave creosote on the flue walls, and creosote is flammable, so a chimney that has never been cleaned is holding fuel inside the house.
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The nuance is how much you burned and how you burned it. A few fires a winter with dry, seasoned wood and a hot flue builds deposits slowly. Nightly fires, damp wood, or a damper closed down to keep the fire smouldering build them fast, and a flue in that condition can be heavily loaded even if nothing looks wrong from the hearth. Nobody can tell which you have by looking up from the firebox, which is why the camera matters more than the broom here.
What years of burning leaves behind
Wood smoke carries unburned gases and tar. When those hit a cooler flue wall they condense and stick. Early on it is a soft soot that brushes off. Left alone and reheated season after season, it hardens into a crust, and in the worst cases into a shiny, tar-like glaze that is bonded to the liner.
That build-up does two things. It narrows the flue, so the chimney draws less well and more smoke tends to spill back into the room. And it burns. A chimney fire is a flue fire feeding on its own lining — usually a loud roaring or rumbling sound, sometimes flames or heavy sparks at the top of the chimney. If that happens, get everyone out of the house and call 911.
There is a second thing a first inspection often turns up. A flue that has gone years without eyes on it can also have cracked clay tiles, open joints between tiles, a failed crown, a missing or damaged cap, or a nest that was built in there over a summer. None of that shows from the living room, and a cracked liner lets heat and combustion gases reach places they should never reach.
What you can check yourself
Look into the firebox with a flashlight
Open the damper and shine a light up. Thick black crust, flaking scale falling onto the smoke shelf, or a shiny tar-like coating all point to heavy build-up.
Work the damper handle
It should move freely between open and closed. Stiffness, grinding or a handle that will not seat usually means debris or rust on the damper plate.
Notice how the fire has been behaving
Smoke drifting into the room on start-up, fires that are hard to get going, or a strong smoky smell on warm damp days all suggest a restricted flue.
Check the outside of the stack from the ground
Look for a missing cap, crumbling mortar joints, a cracked crown or staining down the brick. Stay on the ground — do not go up on the roof.
Test the alarms
Press the test button on every smoke and carbon monoxide alarm in the house. If anyone has a headache, nausea or dizziness when the fire is lit, get outside and call 911.
When to call a technician
If the chimney has never been swept, that is the call by itself — no further symptoms needed. Call sooner rather than later if you see glazed or flaking creosote, if smoke has been entering the room, if the damper is stuck, or if you have heard anything moving above the firebox. Stop using the fireplace until it has been looked at.
One Call Chimney arranges the visit with an independent sweep or mason anywhere in the fifty states. One call sets it up, the estimate is free, and the technician inspects the chimney and gives you the price before any work begins — you approve it first. If the inspection turns up liner work or masonry repair, ask to see the camera footage and ask for the reasoning in writing. Rules on permits and licensing for repair work vary by state, city and county, so check with your local building department before any rebuilding starts.
What the technician will do
- Sweep top to bottomThe full flue is brushed and the debris is removed from the house rather than left on the smoke shelf.
- Run a camera the whole lengthA camera inspection shows what the brush could not reach and whether any glaze is still bonded to the walls.
- Check the liner for cracks and gapsCracked tiles and open joints are the findings that decide whether the chimney is safe to light again.
- Clean the damper, smoke shelf and fireboxThese collect the heaviest debris and are a common reason a damper will not close properly.
- Inspect the cap and crownA missing cap lets water and animals in; a cracked crown lets water into the masonry around the flue.
Related questions
- Is it safe to light one more fire before the sweep?
- Treat the flue as loaded until someone has looked inside it. A chimney with years of untouched creosote has fuel on its walls, and the only thing missing is enough heat to start it.
- Will one sweep fix years of build-up?
- Usually yes for soot and crusted deposits. Hardened glaze is bonded to the liner and sometimes needs a second pass or a different method, which the technician will explain after the camera run.
- What does a first sweep and inspection cost?
- It depends on the height of the stack, how the roof and flue can be accessed, how heavy the deposits are, and what the camera finds in the liner, crown and cap. Call (866) 576-7943 for a free estimate, with the price agreed before work starts.
- How often should it be swept from now on?
- It depends on how much you burn and how dry the wood is. Most homeowners settle into a yearly inspection, with sweeping when the deposits warrant it — the technician can tell you what your own burning habits are producing.
- Does this apply to a wood stove too?
- Yes. Stoves often run cooler and longer than an open fire, which can build deposits faster, and the connector pipe between the stove and the flue needs checking as well.
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